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a) Explain what is the molar solubility if magnesium oxalate (MgC2O4) in water? The solubility product constant for MgC2O4 is 8.6x10^-5 at 25C.

b) For a given reaction, delta H = -25.5 kJ/mol and delta S = -77.0 kJ/mol. The reaction will have delta G =0 at _______________K. Presume that delta H and delta S do not vary with temperature.

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